72572223809 has 2 divisors, whose sum is σ = 72572223810. Its totient is φ = 72572223808.

The previous prime is 72572223803. The next prime is 72572223811. The reversal of 72572223809 is 90832227527.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61854177025 + 10718046784 = 248705^2 + 103528^2 .

It is an emirp because it is prime and its reverse (90832227527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72572223809 - 2³² = 68277256513 is a prime.

Together with 72572223811, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72572223803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36286111904 + 36286111905.

It is an arithmetic number, because the mean of its divisors is an integer number (36286111905).

Almost surely, 2^72572223809 is an apocalyptic number.

It is an amenable number.

72572223809 is a deficient number, since it is larger than the sum of its proper divisors (1).

72572223809 is an equidigital number, since it uses as much as digits as its factorization.

72572223809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 72572223809 in words is "seventy-two billion, five hundred seventy-two million, two hundred twenty-three thousand, eight hundred nine".